Senior .NET Backend Engineer: APIs, Cloud & AI

Ciandt; Colombia; Remote; COP 120,000,000 - 180,000,000; Full time

Benefits offered by this job

Premium Healthcare

Meal voucher

Maternity and Parental leaves

Mobile services subsidy

Sick pay-Life insurance

CI&T University

Colombian Holidays

Paid Vacations

Job summary

CI&T is seeking a Senior .NET Engineer to join our team and build complex backend software solutions. You will collaborate with a multicultural team across Brazil, Colombia, the UK, and the USA, delivering robust services with .NET and SQL Server.

All communication is in English as we drive AI-enabled software and modern CI/CD workflows. The role emphasizes ownership, mentoring, and continuous improvement in a fast-paced environment.

Qualifications

• Strong experience with .NET Framework and .NET Core in real production systems.
• Deep knowledge of ADO.NET and SQL Server.
• Experience with database design and performance optimization.
• Hands-on experience building SOAP and REST APIs.
• Advanced English proficiency.

Responsibilities

• Design, build, and maintain back-end services using C# and SQL Server.
• Create and improve SOAP and REST APIs.
• Write unit and integration tests.
• Perform root-cause analysis to fix issues.
• Integrate systems using design patterns.
• Review code and mentor juniors.
• Contribute to CI/CD workflows.

Skills

.NET Framework & .NET Core

ADO.NET & SQL Server

SOAP & REST APIs

XML handling

Software design patterns

English proficiency

Multicultural teamwork

Job description

CI&T is seeking a Senior .NET Engineer to join our team and build complex backend software solutions. You will collaborate with a multicultural team across Brazil, Colombia, the UK, and the USA, delivering robust services with .NET and SQL Server.

All communication is in English as we drive AI-enabled software and modern CI/CD workflows. The role emphasizes ownership, mentoring, and continuous improvement in a fast-paced environment.